Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4849197 | Process for the preparation of calcium cyanamide | — | 1989-07-18 |
| 4644557 | Process for the production of calcium carbide and a shaft furnace for carrying out the process | Peter Friedrich, Herbert Jekat, Walter Lugscheider, Ernst Riegler, Ernst Zajicek +2 more | 1987-02-17 |